It won't expire
Otherwise, it is likely to be a big problem for our own health and cause our own food poisoning. Then, according to such a thing, we can also see that the mature vinegar soaked in black beans for three years is actually edible, and long-term storage will make such a food have a better taste, then we will also find that it is actually edible. As long as you can be sure that there is no leakage in the middle of such a package, it is best to close it, then you can eat it.
You can go to eat.
Because if there is air leakage, there will be some mildew, so some molds will deteriorate after contact with air. Therefore, it is very harmful to ourselves, so we can eat it if it is not in contact with the air and has a very good sealing performance. Therefore, when we encounter such a situation, we will also feel that black beans will not expire after soaking in old vinegar for three years.
In our daily life, this kind of food is often soaked for a year or two. As long as we seal ourselves perfectly, we can eat. Moreover, such food will not cause any harm to our own health, and it tastes more delicious after storage.